Fix the mouse point's y value for NSEvent locations being inverted
Fix the mouse point's y value for NSEvent locations being inverted

Closes #174

ianyh/Amethyst,m4rw3r/Amethyst,egabancho/Amethyst,ianyh/Amethyst,ianyh/Amethyst,hooplaaa/Amethyst,olsonpm/Amethyst,egabancho/Amethyst,ianyh/Amethyst,cevaris/Amethyst,m4rw3r/Amethyst,olsonpm/Amethyst,cevaris/Amethyst,ianyh/Amethyst,hooplaaa/Amethyst